A search of a car that was impounded after two members of a conspiracy to attack an EDL rally in West Yorkshire were pulled over, found an arsenal of weapons.
Two shotguns, swords, knives, a nail bomb containing 458 pieces of shrapnel, and a partially assembled pipe bomb were discovered.
The nail bomb was an 18-inch (46cm) long rocket which had been stuffed with shrapnel and was to be powered by explosives taken from at least two large fireworks.
A gang of six men pleaded guilty to an attack that - but for a piece of good luck - would have resulted in large numbers of casualties.
A plot by six men from Birmingham to attack an EDL rally in Dewsbury was uncovered by "pure chance", police have said.
Six men accused of preparing to carry out an attack on a rally of the right wing group the EDL have pleaded guilty at Woolwich crown court.